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  • Title: Possible link between history of hypersensitivity to a specific non-steroidal anti-inflammatory drug (NSAID) and positive results following challenge test to alternative NSAIDS.
    Author: Trombetta D, Imbesi S, Vita G, Isola S, Minciullo PL, Saija A, Gangemi S.
    Journal: Arzneimittelforschung; 2009; 59(8):410-4. PubMed ID: 19813464.
    Abstract:
    INTRODUCTION: In subjects with hypersensitivity reactions to non-steroidal anti-inflammatory drugs (NSAIDs), the choice of suitable alternative drugs with the lowest risk of reaction is imperative for therapeutic management. A safe method to exclude drug hypersensitivity is to perform a challenge test for an alternative drug. The present study was conducted to: obtain more information about the safety of NSAIDs; assess the risk of reaction following the administration of a selective or nonselective cyclooxygenase 2 (COX-2) inhibitor in patients with a history of adverse reactions to NSAIDs; investigate if age and/or gender play a role in the susceptibility to develop adverse reactions to NSAIDs. PATIENTS AND METHODS: This retrospective study includes 524 patients with a history of hypersensitivity to NSAIDs admitted to undergo challenge test to an alternative anti-inflammatory drug. Statistical significance was achieved when odds ratio (OR) and risk ratio (RR) values were >1. RESULTS: 8.39% of patients with hypersensitivity reactions to NSAIDs showed a positive challenge test for the alternative drug. Challenge tests for nonselective COX-2 inhibitors were positive in 16.2% of patients with previous reaction to a same drug class and in 12.9% of patients with a history of reaction to selective COX-2 inhibitors. No positive challenge test to a non-selective COX-2 inhibitor was found in patients with a history of hypersensitivity to nimesulide (CAS 51803-78-2). Challenge tests for selective COX-2 inhibitors were positive in 4.6% of patients with a previous reaction to nonselective COX-2 inhibitors and in 7.2% of patients with a history of reaction to selective COX-2 inhibitors. The RR of a positive challenge test to a non-selective COX-2 inhibitor was significant in patients who had a history of reaction to an analogous compound (P 0.21, OR 1.31, RR 1.26). DISCUSSION: In this study, selective COX-2 inhibitors represented the class of NSAIDs less frequently reported as responsible of adverse reaction. These data underline that there is a higher risk to find a positive challenge test to a non-selective COX-2 inhibitor than to a selective one in patients with previous adverse reactions to a non-selective COX-2 inhibitor. Moreover, the data evidence that females could have a higher risk compared to males to develop an adverse reaction to selective COX-2 inhibitors. In conclusion, it appears necessary to pay attention to the kind of NSAIDs reported as the cause of hypersensitivity in anamnesis, because it must be considered a successful guide in choosing the alternative drug to administer to the patient during the challenge test.
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